Works with many other email services via standard Internet email protocols (IMAP, POP3, SMTP).
IMAP push mail (instant incoming email delivery) for those servers that support the IDLE extension (Gmail, GMX, AOL… not supported by Yahoo, for Hotmail please see the FAQ the app's web site).

Backup and restore of app and account settings via Dropbox, OneDrive, Box.com, Google Drive.
This is the Lite version, which is limited to two accounts, no identities, and adds a promo signature to all outgoing messages with a link to the program's web site.

You can add more than two accounts, use identites, and remove the promo signature by purchasing the Pro Unlocker app here on Play.
The app is available in (translated into) more than a dozen languages. Please see the web site for the list, a Google Play policy won't let me include it here.

What's New:
• Easier per-account settings: Signature, Folders, Options are now available on the app's Settings screen
• Exchange: Out of the office
• Exchange: Sync any secondary Contacts folders
• Text to speech notifications: Suppress when there is a phone call
• Search: Auto complete from Contacts

NOTE: If you experience difficulties with downloading Aqua Mail Pro - email app 1.12.0-660 Final Stable APK from given links below, please try to login first to those file hosting before download (it's free to create an account), make sure to uncheck "Use our download manager and get recommended downloads" or similar, if any.